Streptococcus pneumonia is the leading cause of bacterial pneumonia. It can enter your lungs through inhalation or through your bloodstream. There is a vaccination for this type. Haemophilus influenzae is the second most common cause of bacterial pneumonia.
The droppings are similar in color to the wood residue that the insects spill as they eat. Subterranean termite droppings are soft and used in constructing nests, whereas drywood termite droppings are hard and look like piles of sawdust, according to Extension.org.
Mysterious piles of pellets are indicative of drywood termite presence. These piles could be drywood termite droppings known as frass. Drywood frass can be different colors, depending of the color of the wood termites have been eating, but all drywood droppings are six-sided.